Katheryn Winnick
Katheryn Winnick has been practicing martial arts since she was very young and way before she was in the entertainment industry. In fact, she actually got her first black belt when she was just 13! She was also running three schools of martial arts by the time she was only 21. The star of The Vikings has a black belt in karate and taekwondo.
James Caan
Acting legend James Caan has long been involved with martial arts, receiving a 6th Dan level in Gosoku-ryu karate. He trained with Takayuki Kuboto and also actually taught himself, even teaching the Culver City Police Department. That’s seriously impressive.